<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>

<body>
    <script>
        var name = 'global';
        var obj = {
            name: 'obj',
            func: function () {
                this.name = 'func';
                return function () {
                    return this.name;
                }.bind(this)
            }
        }
        alert(obj.func().call(this));
        // func
    </script>
</body>

</html>